/*
 * Copyright (c) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { ts, rule } from "qvog-dsl";

const SEVERITY = 2;
const DOC_PATH = 'docs/no-assignment-in-condition.md';
const DESCRIPTION = 'Assignment in conditional expression may be unintended. Use comparison operators (==, ===) instead of =.';

export default rule()
  .match(ts.isBinaryExpression)
  .when(node => {
      // 检查是否是赋值运算符，并且父节点是条件表达式
      if (node.operatorToken.kind === ts.SyntaxKind.EqualsToken) {
          let parent = node.parent;
          while (parent) {
              if (
                  ts.isIfStatement(parent) ||
                  ts.isWhileStatement(parent) ||
                  ts.isDoStatement(parent) ||
                  ts.isForStatement(parent)
              ) {
                  return true;
              }
              parent = parent.parent;
          }
      }
      return false;
  })
  .report({
      severity: SEVERITY,
      description: DESCRIPTION,
      docPath: DOC_PATH,
  });
